Disazo dyestuffs



Patented Jan. 9, 1945 UNITED STATES PATENT OFFICE nIsAzo DYESTUFFS William B. Reynolds, Chicago, Ill., Swanie S. Rossander, Wilmington, Del., and Donovan E. Kvalnes, Penns Grove, N. J., assignors to E. I.

duPont'de Ncmours & Company, Wilmington, Del., a corporation of Delaware No Drawing. Application September a, 1941, Serial No. 409,832

This invention relates to azo dyestuffs prepared from 2,-2' dichlortolidine 5,5-disulfonic acid by coupling that diazotized intermediate to azo dyestuffs coupling components. The dichlortolidine-disulfonic acid used as a tetrazo component is prepared according to the process described in the copending application of William B. Reynolds, Serial No. 432,246, filed February 25; 1942, now U. S. Patent 2,346,941.

The dichlortolidine di-sulfonic acid; when diazotized and coupled to azo dyestuff coupling components, yields colors of excellent properti'es, Any azo dyest'uff' coupling componehtisuseful although variations in-.properti e s are ob'served in the products. The no component may be cou; pled to 2 moles of the sagnecoupling component or to one mole of one coupling component anjd another mole of a difierent coupling component.

The dyes produced from this intermediate are represented by the-formula" in whichA and B represent ago dyestuif coupling components which may be the' same or maybe difi'erent. Coupling components or meipheriyi; alkylpyraz'olone' series are .particularly adapted' to the productionof useful dye'swithtliis intermediate. v H,

The following examples, in which" parts are in general by weight, illustrate the invention! Example 1- is cotinned; mil is r zqtizetion is mplete;

The tetra'zolisess entially out of solution.

A solution of 348npartsf of ,plienyl 'nithyl' by razolone 1113, 000 parts ofwater and-80 parts of' sodium hydroxide is comedian? by theadd i 7 Claims; (01. 260-461) yellow shade of excellent fastness to light, full ing, washing and perspirationz. It, also dyes wool very well under neutral conditions yielding the same shade and having the same fastness properties. Furthermore, it dyes nylon a yellow shade having good fastness to light and wet treatments.

Example 2 H 161 parts of 2,4 dihydroxy quinoline are used instead of the phenyl' m eu m ,pyrazomn in Exsame. A.? p sdust, s .e ia ed wh h d 1 and n'ylonin greenish yellow shades of good fastnes's toilight, washing and fulling.

' Example 3 j x a l Fourhundred and' forty-oneparts of 2,2 -d1- chlortolidine-5,5'-disulfonic acid are. suspended in 1,000 parts of water and cooled to 510. by the paper and stirring is continuedfor ten "minutes.

Two hundred and fifty-four parts of 4' s'ulfo' bhen'y1 methyl pyrazfoloneare dissolved in 1500 parts of water, 40 ,parts of sodium hydroxide and 300 parts of sodium bicarbonate; After this so- "luti'onis cooled to 0 C. the above diazo solution is added. After coupling is cOmDletethemon-azo dye is isolated by salting and filtration and is redissolved in2500 partsof Wateran'dAO parts dfjsodium hydroxide. Sixty-nine parts ofsodium nitrite are added and sufiicient ice to coolit to 0C. Then hydrochloric acid is added until the suspension is strongly acid to Congo red; Stir-f ring, is continued until diazotization is complete,

u l Tinety five parts of phenol are dissolved in i0 pa s fw er mm of, bd mhyd e. Three hundred parts or sodium carbonate are added and. the so'lutionis iced to 050. The above diazosuspension is added to the phenol solution endearing-15 continueduntil coupling is com- 45" plete; u The coupling mixture is heated until the dye is" completely insolution. The temperature is adjustedto (SO-70 C. and 200 parts of para tolyl M s'i'ilfonelclilofride are added" during thirty min:-

tion of ice and 600 partsofsodium;carbonate'fare' added. To this "s'elutias is addedth e tetrazosus;

dyes wool from an-acetic acid-bath-a--greenish Pens n-i fii reserved; untilp u lm is;

complete: The dyeis filtered offand dried": It

lites; Sodium carbonate is added from time to tim to ma n ain B ll ant Yie1l0 e ka i itv- ,II the con'densation is not complete after the final addition of the sulf'one chloride, more isi ajd ded so that the phenolic hydroxyl group is completely converted-to the sulfone ester.

The dye is isolated by salting and filtering and has the following formula:

CH3 C1 Cl It dyes wool a greenish-yellow shade of excellent COH S OiNa S OsNa S OaNa fastness to light and fulling.

then with one mole of phenol, followed by condensation with para-tolyl-sulfone-chloride. In

place of the latter, other aryl sulfone chlorides can be used. Examples of these are benzene sulfone chloride, para chlor benzene sulfone chloride, beta naphthyl sulfone chloride, etc.

Example One mole oi Coupled to two moles of- Shade Dichlortolidine disullonic acid Aceto acefamhde Y 11 d Acetoacet-o-chloro anilide Do. Acetoacet-p-chloro anilide. Do. Acetoacet-o-tnlnidid Do. Acetoacet-m-xylizlide.. Do. Acetoacet-p-phenetidido Do. 3 nitrO phenyl methyl pyrazolone Do. 4 nitro pnenyl methyl pyrazolone Dot 4 sulfo phcnyl methyl pyrazolone. Do. 3 sulfo phenyl methyl pyrazolone Do. 4 chlor 3 sulfo phenyl methyl pyrazolone Do. 3, 4 dichloro phenyl methyl pyrazclone. Do. 2 chloro 5 sull'o phenyl methyl pyrazolone. 'Do. 3 amino phenyl methyl pyrazolone DO. 4 amino phenyl methyl pyrazolone Do. 2, 5 dichlor-4-sull'0 phenyl methyl pyrazolone. Do. l-phenyl pyraz0lone 3-carboxylic acid Do. l-phcnyl pyr1zolone-3-carboxylic ethyl est Do. 1-(4 n tro phenyl)pyrazolone-Zi-carboxylic ac Dc. 1-(4 nitro phenyhpyrazolone -3- carboxylic ethyl ester.. Do. 4'8 disulfo 2 naphthyl methyl pyrazolone Do. 4'8 disullo 2 naphthyl pyrazolone 3-carboxylic acid Do. Naphthionic ocirl Orange. Z-acetyl arnino-7-naphthol. Yellow brown. l-acetyl amino-7-naphthol. Orange. 2-hydroxy-3naphthoie acid Do. Anilide oi 2-hydroxy-3-naphthoic acid.-- Salmon. 2-amino-3-naphth0ic acid.. Orange.

. 'Aceto acetic ester.

2-acetyl aminc-5-naphthol-7-sullonic acid.

2-carbethoxy amine-5-naphthol-7-snlfonic acid. 2 (beta-amino-ethyl)-5-naphthol-7-sulfonic acid. Z-benzoyl amino-5-naphthol-7-sulfonic acid. 2(4 nitro benzoyl amino)-5-naphthol-7-sl1lfonic acid. 2(para-tolyl sulfonyl amino) 5 naphthol 7 sulfonic acid 2(phenyl amino)-8-naphthol-6-sulfonic acid- 2-an1inc-B-naphthol-S-sulfonic acid l-acetyl amino-B-naphthol-l-sulfonic acid. l-acetyl amino-E-naphtho1-7-sulfonic acid Phenol. Phenol, cthylated Para cresol Ortho cyclohexyl phenol. 4-l1ydroxy diphenyl 2-chlor-4-tertiary butyl phenol... Salicylic acid 2-hydroxy-Zi-methyl-benzoic acid 2-hydroxy-fi-methyl-benzoic acid 3,5-clil1ydroxy benzoic acid... 2-snlfo-4-methyl phenol Dimethyl dihydroresorcin Barbituric acid Beta naphthol- Tetra hydro beta naphthol 4-acetyl-lnaphthol 1-naphthol-3-sulfonic acid l-naphthol-i-sulfonic acid l-naphthol-fi-sulfonic acidl-naphthol-3,6-disu1fonic acid 2-naphthol-8-s ulfonic acid B-hydroxy qumolme 5-sulfo-8-hy droxy quinoline Citrazinic acid. 2.4-dihydroxy-5,6-dlhydro pyrmdene Yellow orange Green yello w. Red yellow.

0. Green yellow.

D0. Yellow. Yelligw orange.

0. Red orange. Orange.

" 2,-3 avg-ass dams l: V v One mole ofthis goupled 01'1e moleof Shade -=DoTDs- 2,4-dihydroxy quinolinerl DC'IDS 2Z5 dichlor-4 sulio phenyl methyl pyrazolon do 4 sulfo phenyl methyl py'azol one.

Barbituric acid... Aceto acetanilide Aceto acetic ester Para-cresol Resorcin Tetrahydro-beta-fl h 1,3,5 xylennl Phenol Phenol-l-p-tolyl sulfonyl chloride Salicylic acid l-acetyl amino-8-naphthol-6-sulfonic acid 2,4 dihydroxy quinoline Acgto simntanilidn 2-phenyl amino-B-naphthol-fi-sulfonic acid Resorcm 2,4 dihydroxy qflinnh'na Aceto acetanilide Barbituric ar-id 1 chlorlde. 2-naphtho1-8-su1ionic acid-l-p-tolyl sulfonyl chloride 2-hydroxy-3-naphthoic acid-l-p-tolyl sulfonyl chloride l-acetylamiI1o-8-naphtho1-4-sulfonic acid+p-tolyl sulfonyl chloride... R

Red orange. Yellow.

. Do. Brown. Yellow.

o. Brownish orange.

Yellow red.

when dyed on wool.

As many apparently widely different embodiments .of this invention may be made without departing from the spirit and scope thereof, it is understood that we do not limit ourselves to the specific embodiments thereof except as defined in the appended claims.

We claim:

1. A compound represented by the formula (3H3 1 on em RN=N v 40 r I,

soan S0311 pyrazolone from the benzene and series.

3. The compound represented by CH; Cl (I71 CH3 I S 0311 S 0311 methyl pyrazolone.

2. The compounds represented by the formula N=NRq in which R and R2 are both radicals of an aryl naphthalene the formula in which R and R2 are both radicals of phenyl 4. The compounds represented by the formula 0 H SOaH 'wherein R is the radical of an aryl pyrazolone ,of the benzene and naphthalene series and R2 is the radical of one-of the group represented by i R and a phenol condensed with a p-tolyl-sulfonyl chloride.

(iJHz (I31 by O OH OaNa s OaNa I OaNa 65 f r E 0311 Y i 03H 60 in which one of R and R2 is a radical of an aryl pyrazolone from the benzene and naphthalene series and the other is the radical of a phenol condensed with a p-tolyl-sulfonyl-chloride.

5. The compound represented by the formula 6. The process which comprises tetrazotizing 2,2-dich1oro-to1idine-5,5' -disu1fonic acid and 2,2-dichlor-t01idine-5,5'-disulfonic acid and coucoupling each diazo group thereof to phenylpling each diazo group thereof to an azo dyemethyl-pyrazolone.

stufi coupling component, of which at least one is an aryl pyrazolone from the benzene and riaph- 5 WILLIAM B. REYNOLDS. thalene series. SWANIE S. ROSSANDER.

'7. The process which comprises tetrazotizing DONOVAN E. KVALNES. 

